Growing Zinnias in Shade: Tips and Tricks

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Zinnias are delightful, cheerful, and easy-to-grow annuals that can add a pop of color to any garden. While they undoubtedly thrive in full sun, some zinnia varieties can still flourish in partial or dappled shade. In this article, we’ll share our top tips on growing zinnias in shade and show you which cultivars work best.

How to Grow Zinnias in Shade

Choose the Right Variety

When trying to grow zinnias in shady areas, selecting the right variety is crucial. Some zinnias are more tolerant of low-light conditions than others. Some of the best zinnia varieties for shady areas include:

• Benary's Giant Deep Red: This variety has large, 4-inch blooms that come in deep red hues.
• Cut and Come Again Mix: With a range of bright, cheerful colors, this variety is excellent for cut flower arrangements.
• Lilliput Rose: These zinnias have small, rose-colored flowers that grow well in partial shade.

Provide Adequate Light

While it’s true that zinnias need plenty of sun to thrive, you can also use a grow light to help supplement natural light for shade-grown zinnias. Set up a high-quality fluorescent grow light above your plants and aim for around 12-16 hours of light each day.

Optimize Soil Conditions

Soil quality is critical to growing any plant, and zinnias are no exception. You'll need to optimize the soil conditions to increase your chances of achieving success when growing zinnias in shade.

• Soil pH: Ideally, zinnias should grow in soil with a pH level between 6.0 and 7.5.
• Soil Type: Zinnias prefer well-draining soil that is high in organic matter. Aim for a sandy loam mix if possible.
• Fertilizer: Use a balanced fertilizer regularly, following manufacturer instructions.

Water and Fertilize Regularly

Zinnias require regular watering to keep them healthy, but be mindful not to overwater them, as this can cause root rot. Water when the top inch of soil feels dry to the touch, and preferably with water at room temperature or slightly warm since cold water can shock the plants rapidly.

Watch Out for Pests and Diseases

Pests and diseases can wreak havoc on zinnias regardless of where you grow them. Common pests that may cause problems for your shade-grown zinnias include spider mites, aphids, and thrips, while powdery mildew and bacterial leaf spots are prevalent zinnia diseases. Avoiding overwatering, allowing for adequate airflow and reducing excessive moisture within the growing area can help control and prevent such issues.

With care, you can still enjoy colorful blooms all season long even if your garden has some shady areas. Choosing the right variety, providing adequate light, optimizing your soil conditions and preventing pest and disease damage are critical steps in growing zinnias in shade.

FAQ

Can zinnias grow in full shade?

No, they prefer full sun, but a light shade can work.

What are the best zinnia varieties for shady areas?

Some of the best zinnia varieties for shady areas include Benary's Giant Deep Red, Cut and Come Again Mix, and Lilliput Rose.

Do zinnias need direct sunlight to bloom?

Zinnias prefer full sun, but some cultivars may still grow and blossom in partial or dappled shade.

How often should I water zinnias growing in shade?

Water when the top inch of soil feels dry; avoid overwatering, as it can lead to root rot.

Can I use a grow light to supplement natural light for my shade-grown zinnias?

Yes, a grow light can help supplement natural light if necessary.

How can I prevent powdery mildew on my shade-grown zinnias?

Reducing excessive moisture within the growing environment, allowing sufficient airflow between plants and applying fungicides.

What are some common pest problems that affect zinnias in shade?

Common pests such as spider mites, aphids and thrips can be issues for zinnias grown in shade.

When is the best time to plant zinnias in shady areas?

The best time to plant zinnias in shady areas is generally in spring, after any chance of frost has passed.

Can I still harvest cut flowers from shade-grown zinnias?

Yes, shade-grown zinnias can still produce beautiful cut flowers depending on how much sunlight they receive.

Are there any other annuals that do well in partial or dappled shade?

Some other annuals that do well in partial or dappled shade are begonias, impatiens, and pansies.